<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="/js/jquery.min.js"></script>
    <script>
        $(function () {
            var aaa = $("b p");
            aaa.css("color", "red");
        })
    </script>
</head>
<body>
    <b>
        aaa
        <div>bbb</div>
        <p>ccc</p>
    </b>
</body>
</html>